Window constructions



March 14, 1967 B. K. BAKKE 3,308,582

WINDOW CONSTRUCTIONS Filed June 29, 1965' F|G.1 M

2 Sheets-Sheet 1 gsg 37 42 38 40 76 March 14, 1967 B. K. BAKKE 3,308,582

wmnow CONSTRUCTIONS Filed June 29, 1965 2 Sheets-Sheet 2 ung Z I 1 nwfi/II United States Patent G WINDOW CGNSTRUCTIONS Bjprn Knag Bakke, Bergen, Norway, assignor to A. Knag A/S, Bergen, Norway Filed June 29. 1965, Ser. No. 467,974 Claims priority, application Germany, July 7, 1964, K 53,396 14 Claims. (Cl. 49-383) In window constructions where both the frame and the surrounding casement are made of metal having a large heatconductivity, great difiiculties arise with the insulation.. Above all it is essential to avoid through or continuous metal parts, that is to say metal parts which extend in one piece from the outer side to the inner side, as in such cases the formation of condensation on the inner side of the window cannot be avoided. Even when the frame is constructed in several parts, the formation of cold bridges can nevertheless occur, if the sealing between the inner and the outer portion of the window is too thin and does not provide suflicient resistance to the transfer of heat.

In the newer types of wall construction, metal is nevertheless used as the building material. Aluminum, especially, is used to a large extent in such construction, since the metal is easy to work into profile members of complicated cross-section and, in addition, is weather resistant without special treatment. So-called curtain wallings are known which consist of aluminum members and glass plates, which are fully maintenance-free.

It is an object of the invention to provide a window construction of metal in which the occurrence of cold bridges can be wholly avoided.

A window construction according to the invention includes a metal frame with a glass pane located therein, together with a casement which surrounds the frame and consists of a pair of horizontal metal members and a pair of vertical metal members, at one end of which the metal frame is pivotably mounted. The main features of the subject window construction reside in the distance between the inner edges of the profile members both in the horizontal and vertical direction on one side of the window, being less than the corresponding distance between the inner edges of the metal frame on the same side, and in each profile members inner edge being provided, in a manner known per se, with a sealing strip which consists of pliable material and which bears sealingly against the glass pane.

Further features of the invention will be evident from the following description of a convenient embodiment thereof with reference to the accompanying drawings, in which:

FIGURE 1 is a perspective and schematic view of a window construction of the present invention, showing the frame in the half open position.

FIGURE 2. is a scrap section through the frame and the adjacent parts of the casement, again with the frame in the half open position, and

FIGURE 3 is a section similar to that of FIGURE 2 in which the frame is in the closed position.

In FIGURE 1, there is shown schematically a wall opening having upper and lower casement members or surround members together with a pair of opposed, vertical casement members or surround members 11. In a corresponding manner, the window frame is provided with upper and lower, horizontal frame members and a pair of vertical frame members 13. The right vertical side of the frame 12, 13 is pivotably mounted on pivot pins 14 on the right vertical side of the casement 10', 11.

This general construction of a laterally mounted window frame is well known. In conventional windows having wooden frames, the sealing of such windows is not associated with special disadvantages, since the wooden frame quite simply forms an abutment itself against rab bet portions on the casement. The wooden frame has in itself sufficient insulating ability.

With the metal frames which have come into use in recent times, there is the difficulty, however, that metal is a very good conductor of heat. If the metal frame is of unitary construction, the inwardly facing portion of the frame assumes the same temperature as the outwardly facing part of the frame. Especially in the winter, the formation of undesirable condensation can occur, since the moisture settles down on the inner part of the frame. Even when the frame consists of an outer'and an inner part together with an intermediate packing, such formation of condensation can occur, since the sealant packing must be relatively thin and, therefore, its ability to insulate will be relatively poor. These disadvantages of metal frames are well-known.

In this embodiment, it is proposed to construct the easement 10, 11 so broad that it completely covers the metal frame and so that it forms, at its inner edge 15, an abutment against the glass pane 16-. Even when the metal frame is of unitary construction, it will not be able, in this case, to form any cold bridges between the outer side and the inner side.

Referring to FIGURES 2 and 3, an aluminum profile member 17 has an attachment member 18 which by means of screws 19 is secured to a locating bracket 20 which, in turn, is secured by means of bolts 21 to a wooden framework 22.

Attachment member 18 is provided with projections 23 for the reception of a cover strip 24 of elastic material, which completely shields the inwardly free surfaces of said portion. Strip 24 is constructed with two cavities 25, 26 so as to increase the strips pliability and ability to insulate. The end of attachment member 18 which faces the window carries a flanged projection 27 for the reception of brackets 28 of nylon or a similar low heat conducting plastic. Brackets 28 are provided with a hole for the reception of the pivot pins 14 of the window frame.

Attachment member 18 has a frame portion 30' which extends in a direction substantially transverse of the window pane and carries at approximately its center a flange 31 directed towards the wall. Between flange 31 and the adjacent wall portion 32 is located a sealing strip 33.

The outer end of the frame portion 3:": terminates in a flange 34 which extends parallel to the window pane.

Flange 34 extends in a direction inwardly into the window opening and thus completely covers the metal frame por tion 35 which is located at this side. At the free end 36, flange 34 carries two legs 37 directed towards the window pane between which legs there is received a sealing strip 38 which extends outwards in two tapered ends 39, 40 which form an abutment against the glass pane 16.

In addition, flange 34 has approximately at its center an angle flange 42 which covers the vent openings 43.

The window frame includes a web portion 44 which has at its outer nd the above-mentioned portion 35 and at the inner end, a broad portion 45. Portion 45 is extended so far inward toward the center of the window that its free inner end 46 is disposed directly above the corresponding end of the flange 34. In addition, the portion 45 carries a projection 47 for the reception of a U-shaped sealing strip 48 which surrounds the edge portion of the glass pane 16.

The portion 45 possesses at the end which faces the wall, a curved edge 49 which is partly constructed as an ornamental edge and partly serves to receive the pivot pin 14 of the window. In addition, edge 49 also bears against the cover strip 24, so that good scaling is attained between window and casement.

On the web portion 44, there are two small angled leg projections b, which receive between them a strip 51 of elastic material. In the closed condition of the window, strip 51 bears against the projection 27 of the attachment member 18, whereby the space between the casement and the window frame is divided up into two cavities 52, 53. In this way, convection currents are avoided which otherwise can result in loss of heat.

In practice, it has been shown that a metal window which is assembled according to this principle is completely free of draught and cold bridges are to a large extent avoided. As the wind-ow casement and the frame are manufactured from corrugated aluminium, the Window construction is completely maintenance-free.

Such a window construction can be installed as a separate unit in a building construction or, if desired, it can be introduced as a building component in a curtain wall construction of glass and aluminium. In FIGURE 3, the window is installed in a wooden house.

After reading the foregoing detailed description of an embodiment of the invention, it is manifest how the object originally set forth can be achieved. Moreover, various modifications of the embodiment will be apparent to those of ordinary skill in the art.

What I claim is:

1. In a window construction for mounting in a wall structure and comprising a metal frame, a glass pane located therein and a metal casement formed from a pair of horizontal profile members and a pair of vertical profile members and having pivotabiy mounted on one of its profile members an edge portion of said frame, the improvement which comprises in spacing inner edges of said profile members on one side of said pane and in both a vertical and a horizontal direction, at a distance which is less than the corresponding distance between corresponding edges of said frame on the same side of said pane, and which further comprises a sealing strip arranged at said inner edges of the profile members to bear sealingly against said pane.

2. In a window construction for mounting in a wall structure and comprising a metal frame, a glass pane located therein and a metal casement, said casement and said frame both being formed from a pair of horizontal profile members and a pair of vertical profile members and an edge portion of one of the profile members of said frame being pivotably mounted on one of the profi-le members of the casement, the improvement which comprises in spacing inner edges of the profile members of the casement on one side of the pane and in both a horizontal and vertical direction, at a distance which is less than the corresponding distance between corresponding edges of profile members of said frame on the same side of the pane, and which further comprises a sealing strip arranged at said inner edges of the casement profile members to bear sealingly against said pane and an elastic cover strip of low heat conductivity covering the side of the easement opposite to that hearing the inner edges of its profile members, said frame forming an abutment against said cover strip.

3. A window construction according to claim 2, wherein each of the profile members of the frame has a flange extending towards the wall structure at said opposite side of the casement and terminating in a thickened bead edge portion which constitutes said cover strip abutment.

4-. A window construction according to claim 3, wherein the pivotably mounted edge portion of the frame profile member is formed by its bead edge portion which bounds a space through more than 180 for the reception of casement pivot means, and plastic brackets of low heat conductivity are provided on said opposite side of said casement in each of which is formed a hole for the reception of said pivot means.

5. In a window construction for mounting in a wall structure and comprising a metal frame, a glass pane located therein and a metal casement, said casement and said frame both being formed from a pair of horizontal profile members and a pair of vertical profile members and an edge portion of one of the profile members of said frame being pivotably mounted on one of the profile members of the easement, the improvement which comprises in spacing inner edges of the profile members of the casement on one side of the pane and in both a vertical and a horizontal direction, at a distance which is less than the corresponding distance between corresponding edges of profile members of said frame on the same side of said pane, and which further comprises a first sealing strip arranged at said inner edges of the casement profile members to bear sealingly against said pane, the latter profile members each being formed with an integral fastening member secured to a framework of the wall structure, said fastening member having a surface formed with projections which is located on the side of the casement opposite to that hearing the inner edges of its profile members, and an elastic cover strip of low heat conductivity received by the projections of the fastening members thereby covering said opposite side of the casement, the profile members of said frame each forming an abutment against said cover strip.

6. A window construction according to claim 5, wherein the cover strip is formed with two cavities which serve to improve the insulation and yieid characteristics thereof.

7. A window construction according to claim 5, wherein the frame and casement profile members are formed of corrugated aluminium.

8. A window construction according to claim 5, wherein each of the profile members of the frame has a flange extending towards the wall structure at said opposite side of the casement and terminating in a thickened bead edge portion which constitutes a cover strip abutment.

9. A window construction according to claim 8, wherein the pivotably mounted edge portion of the frame profile member is formed by its bead edge portion which bounds a space through more than for the reception of casement pivot means, and plastic brackets of low heat conductivity are provided on said opposite side of said casement in each of which is formed a hole for the reception of said pivot means.

10. A window construction according to claim 9, wherein the fastening member of the casement profile member associated with the pivoted frame profile member, has at an end directed toward the window and remote from the wall structure, a flange-shaped projection for receiving the plastic brackets.

11. A window construction according to claim 5, wherein the fastening member has a portion extending substantially transversely of the pane, said transverse portion having at about its center a first flange directed toward the wall structure, and between said first flange, said transverse portion and an adjacent portion of the wall structure, a second sealing strip is located, and wherein the transverse portion terminates in a second flange extending parallel to the pane and inward relative to a window opening to cover completely an adjacent flange of the frame, said second flange having at its free end twin legs directed towards the pane and receiving the first sealing strip therebetween which strip has outwardly extending tapering end portions forming an abutment against the pane.

12. A window construction according to claim 11, wherein the second flange is formed with vent openings and has an angle flange at about its center covering said openings.

13. A window construction according to claim 11, wherein the frame profile members each include a web portion which is formed at one end with the flange covered by the second flange of the transverse portion of the fastening member and at the other end with the flange terminating in one direction in the bead edge portion, the latter flange extending in the other direction so far inward toward the center of the window that its free end is disposed directly above the corresponding end of the second flange and having a branch flange intermediate said free end and said web portion, and a U-shaped sealing strip surrounding the edge portion of the pane being located in position on one side of the pane, between said edge por tion and said branch flange and on the other side of the 10 pane, between said edge portion and said covered flange.

14. A window construction according to claim 13, wherein the web portion has twin projecting legs disposed between the covered flange and the bead edge portionterminating flange, and an elastic strip received between 15 said legs bears, in the closed position of the window,

References Cited by the Examiner UNITED STATES PATENTS 3,083,799 4/1963 Bakke 49-321 3,103,714 9/1963 Wilks 49-401 FOREIGN PATENTS 230,964 10/ 1960 Australia. 563.268 5/1957 Italy.

HARRISON R. MOSELEY, Primary Examiner. 

1. IN A WINDOW CONSTRUCTION FOR MOUNTING IN A WALL STRUCTURE AND COMPRISING A METAL FRAME, A GLASS PANE LOCATED THEREIN AND A METAL CASEMENT FORMED FROM A PAIR OF HORIZONTAL PROFILE MEMBERS AND A PAIR OF VERTICAL PROFILE MEMBERS AND HAVING PIVOTABLY MOUNTED ON ONE OF ITS PROFILE MEMBERS AN EDGE PORTION OF SAID FRAME, THE IMPROVEMENT WHICH COMPRISES IN SPACING INNER EDGES OF SAID PROFILE MEMBERS ON ONE SIDE OF SAID PANE AND IN BOTH A VERTICAL AND A HORIZONTAL DIRECTION, AT A DISTANCE WHICH IS LESS THAN THE CORRESPONDING DISTANCE BETWEEN CORRESPONDING EDGES OF SAID FRAME ON THE SAME SIDE OF SAID PANE, AND WHICH FURTHER COMPRISES A SEALING STRIP ARRANGED AT SAID INNER EDGES OF THE PROFILE MEMBERS TO BEAR SEALINGLY AGAINST SAID PANE. 